Results 21 to 30 of about 3,408 (306)

Weighted Morrey Estimates for Multilinear Fourier Multiplier Operators

open access: yesAbstract and Applied Analysis, 2014
The multilinear Fourier multipliers and their commutators with Sobolev regularity are studied. The purpose of this paper is to establish that these operators are bounded on certain product Morrey spaces Lp,k(ℝn).
Songbai Wang, Yinsheng Jiang, Peng Li
doaj   +1 more source

Solution Formula of Korteweg Type by Using Partial Fourier Transform Methods in Half-Space without Surface Tension

open access: yesJTAM (Jurnal Teori dan Aplikasi Matematika), 2023
Sharp-interface models and diffuse-interface models are the two basic types of models that describe liquid-vapour flow for compressible fluids. Their depictions of the line dividing liquid from vapour are different.
Yiyi Fikri Nurizki   +2 more
doaj   +1 more source

DESIGN OF FFT ARCHITECTURE USING KOGGE STONE ADDER

open access: yesInternational Journal of Advances in Signal and Image Sciences, 2018
An efficient Fast Fourier Transform (FFT) algorithm is used in the Orthogonal Frequency Division Multiplexing (OFDM) applications in order to compute the discrete Fourier transform.
Rambabu Nusullapalli, Vaishnavi N
doaj   +1 more source

Numerical Analysis of Fourier Finite Volume Element Method for Dirichlet Boundary Optimal Control Problems Governed by Elliptic PDEs on Complex Connected Domains

open access: yesMathematics, 2022
In this research, we investigate an optimal control problem governed by elliptic PDEs with Dirichlet boundary conditions on complex connected domains, which can be utilized to model the cooling process of concrete dam pouring.
Mengya Su, Liuqing Xie, Zhiyue Zhang
doaj   +1 more source

A brief description of operators associated to the quantum harmonic oscillator on Schatten-von Neumann classes

open access: yesRevista Integración, 2018
In this note we study pseudo-multipliers associated to the harmonic oscillator (also called Hermite multipliers) belonging to Schatten classes on L2(Rn). We also investigate the spectral trace of these operators.
Duván Cardona
doaj   +1 more source

The multipliers of multiple trigonometric Fourier series

open access: yesOpen Engineering, 2016
We study the multipliers of multiple Fourier series for a regular system on anisotropic Lorentz spaces. In particular, the sufficient conditions for a sequence of complex numbers {λk}k∈Zn in order to make it a multiplier of multiple trigonometric Fourier
Ydyrys Aizhan   +2 more
doaj   +1 more source

Uncertainty Principles for Fourier Multipliers [PDF]

open access: yesJournal of Fourier Analysis and Applications, 2020
The admittable Sobolev regularity is quantified for a function, $w$, which has a zero in the $d$--dimensional torus and whose reciprocal $u=1/w$ is a $(p,q)$--multiplier. Several aspects of this problem are addressed, including zero--sets of positive Hausdorff dimension, matrix valued Fourier multipliers, and non--symmetric versions of Sobolev ...
openaire   +3 more sources

Low-Complexity Filter for Software-Defined Radio by Modulated Interpolated Coefficient Decimated Filter in a Hybrid Farrow

open access: yesSensors, 2022
Realising a low-complexity Farrow channelisation algorithm for multi-standard receivers in software-defined radio is a challenging task. A Farrow filter operates best at low frequencies while its performance degrades towards the Nyquist region.
Temidayo O. Otunniyi   +1 more
doaj   +1 more source

Spherical-Radial Multipliers on the Heisenberg Group

open access: yesInternational Journal of Analysis and Applications, 2020
Let Hn be the (2n+1)-dimensional Heisenberg group. We consider a radial Fourier multiplier which is a spherical function on Hn and show that it is a Herz-Schur multiplier.
M.E. Egwe
doaj  

Homeomorphic changes of variable and Fourier multipliers [PDF]

open access: yesJournal of Mathematical Analysis and Applications, 2020
We consider the algebras $M_p$ of Fourier multipliers and show that every bounded continuous function $f$ on $\mathbb R^d$ can be transformed by an appropriate homeomorphic change of variable into a function that belongs to $M_p(\mathbb R^d)$ for all $p ...
Vladimir Lebedev, Alexander Olevskii
openaire   +3 more sources

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